• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Lighting device for motor vehicles with a Lichtleitlement (14), which has a light entrance surface (16) and a light exit surface (15), wherein at least partially on at least one surface of the light guide element (14) an electrical luminescent layer (19) is provided. the luminescent layer (19) is advantageously designed as an OLED layer.
    公开号:AT514217A1
    申请号:T50313/2013
    申请日:2013-05-08
    公开日:2014-11-15
    发明作者:Markus Reinprecht；Stefan Miedler；Gerald Böhm；Adolf Teufl；Thomas Edletzberger
    申请人:Zizala Lichtsysteme Gmbh；
    IPC主号:
    专利说明:

    P13103
    Lighting device for motor vehicles
    The invention relates to a lighting device for motor vehicles with a light guide, which has a light entrance surface and a light exit surface.
    Lighting devices of this type are nowadays widely used in the automotive field, for example, such light guide elements are arranged around the outlet openings of headlights around, for example, originating from LEDs light is radiated into the light entrance surface and emitted to the front. In addition to the actual lighting function motifs of the design for the design and the geometry of such light guide elements are often essential. In addition to the use in the field of headlights, such lighting devices are also arranged for interior lighting or laterally or at the rear of motor vehicles. Solutions are known in which side surfaces of the light-guiding element are provided with a structuring of disturbing parts, so that the light irradiated into the light-entry surface is scattered at the impurities and also emitted laterally.
    A lighting device of this type is shown for example in DE 10 2010 054 923 Al in connection with a headlight, whereas DE 10 2011 050 422 Al discloses a similar application in a tail lamp of a motor vehicle.
    An object of the invention is to provide a lighting device of the subject type which allows light emission not only from the light exit surface but also laterally. On the one hand, no elaborate structuring of the light-guiding element is required and, on the other hand, a high level of flexibility with regard to the quality of the emitted light (intensity, color) should be possible.
    In order to achieve this object, the invention provides that an electrical luminescent layer is provided at least partially on at least one surface of the light-guiding element.
    In fact, in a lighting device according to the invention for a viewer in a simple way depth impressions or 3-D effects can be achieved, for which according to the prior art complicated optical fiber combinations and structures were required by 2/14 -2- P13103. It is also possible to realize a plurality of lighting functions for a viewer of apparently the same geometry.
    Such luminescent layers, for example, as so-called "OLED". They can be formed, enable illumination in different colors and are technically problem-free insofar as they can be made very thin.
    It should be mentioned at this point that the use of OLED layers in connection with motor vehicle lighting has become known from DE 10 2009 009 087 A1, in which document a lighting device for a motor vehicle is shown, in which a reflector for a first Light source is arranged a reflector covering the thin, planar organic light-emitting diode (OLED), whereby, for example, the light functions of a rear fog lamp and a tail light can be superimposed.
    As already mentioned, it is provided in an advantageous embodiment that the luminescent layer is formed as an OLED layer, but it is also possible to form the luminescent layer, for example, as an electroluminescent layer.
    According to an advantageous embodiment, a rod-shaped light guide is provided, which has at least one feed point for light at least one light source, the light guide along at least a portion of its length an impurity assembly and one of these opposite light exit surface and the light entry surface of the light guide connects photometrically to the light exit surface of the rod-shaped light guide , The use of such a rod-shaped light guide, which is well known in motor vehicle lighting technology (e.g., AT 503 926 Bl), provides good illumination, which can also emanate from a single light source sitting at the feed point, with light emitting diodes being particularly suitable as light sources.
    Furthermore, it can be provided that the light-guiding element is designed as a hollow cylinder, the two end faces of the cylinder wall forming the light entry and the light exit surfaces. Such a geometry can be used flexibly, for example, in connection with front lights in motor vehicles. In particular, it may be provided that the 3/14 -3- P13103
    Cylinder wall at least partially surrounds the light exit opening of a headlamp module.
    It is further expedient if the rod-shaped optical waveguide is adapted in its geometry to the light entry surface of the light-guiding element in order to avoid light losses and to simplify the construction.
    On the other hand, it is also possible that the light entry surface of the light guide element are assigned individual light sources, which feed light directly into the light guide. In some cases, one or only a few light sources may suffice to ensure satisfactory light emission.
    In general, it is preferable if the light guide is made of a transparent material. In this way, low light losses and unnecessary heating of the light-guiding element is avoided. However, this does not mean that, in some cases, the requirement for transparency can be waived and an opaque material can be used if special lighting effects are desired.
    Another variant is characterized in that an electrical luminescent layer is provided at the light entry surface of the light-guiding element. Such a luminescent layer at the light entry surface can be used instead of the above-mentioned rod-shaped optical waveguide or instead of discrete individual light sources.
    In particular, when forming the light guide as a hollow cylinder, it is in many cases aesthetically particularly satisfactory if an electrical luminescent layer is provided on outer surfaces of the hollow cylinder.
    Other aesthetic impressions arise if the electrical luminescent layer is translucent.
    The invention together with further advantages is explained in more detail below with reference to embodiments, which are illustrated in the drawing. In this show
    Fig. 1 shows the basic structure of a lighting device according to the invention together with a rod-shaped light guide in partial and perspective view, 4/14 -4 P13103
    Fig. 2 shows a variant in which instead of a rod-shaped light guide individual light sources are provided and
    Fig. 3 shows a variant in which the light guide is in the form of a hollow cylinder and surrounds the light exit surface of a headlamp module, also in partial and perspective view.
    With reference to FIG. 1, a parallelepiped-shaped light-guiding element 1, which is advantageously made of a completely transparent material, in particular of plastic, and which has a light entry surface 2 and a light exit surface 3, can be seen. The light-guiding element 1, which could also be referred to as thick-wall optics, is assigned a rod-shaped light guide 4, which has a feed point for light, in this case an end face 5 on which an LED element 6 is provided as the light source in the present case. The light guide 4 has here on a flat lower surface an impurity assembly 7 and has these opposite a light exit surface 8, which is approximately cylindrical in the present case, however, could just as well be flat or have a different shape. Light guides of this type are known, wherein the light fed from the light source 6, here an LED element, light along the light guide 4 and reflected by the impurity assembly 7, e.g. an array of small prisms, is emitted via the light exit surface 8 to the outside.
    It can be seen that the light emerging from the light exit surface 8 enters the entry surface 2 of the parallelepiped light guide element 1 and exits mainly at the opposite light exit surface 3 for illumination purposes, wherein the arrangement can be used, for example, for position lights in a motor vehicle. In the example according to FIG. 1, both the light guide 4 and the light guide 1 are rectilinear for simplicity, but it should be clear that the light guide can be arbitrarily curved, with an adjustment of the curvature between the light guide 1 and the light guide 4 in general is made. Also, the light can be fed into the light guide 4 not only at a single position, as here at the end face 5, but for example at both end faces of the light guide or in addition to branching into the light guide branches. 5/14 -5- P13103
    In order to provide an additional illumination source, an electrical luminescent layer 9 is applied in Fig. 1 only on one side surface, here the right in the image. Advantageously, such a luminescent layer is formed as an OLED layer. This is understood to mean an organic light-emitting diode which represents a luminous thin-film component made of organic semiconductive materials and which can glow in different colors when a voltage is applied, depending on the composition. In this case, the OLED layer can also be transparent, thus translucent.
    Although only one side surface is provided with an electrical luminescent layer in the example according to FIG. 1, it should be clear that other surfaces of the light-conducting element can also be completely or partially provided with such a luminescent layer.
    Instead of the light guide 4, a luminescent layer may be provided on the light entry surface 2, which then serves as the light source. In addition, side surfaces of the light-guiding element can be provided with similar or different luminescent layers, wherein the choice of the color and / or intensity of the light emitted by the respective luminescent layers is adapted to the corresponding requirements.
    It should be noted that in the context of the invention luminescent layers need not necessarily be formed as OLED layers, but that electroluminescent layers may also be provided. Electroluminescent films are commercially available and emit light when an AC voltage is applied. They can also be transparent.
    Fig. 2 shows again a lighting device according to the invention, which is similar to that of FIG. 1 in that it also has a cuboid light-guiding element 1 with a light entrance surface 2 and a light exit surface 3. In the present case, an electrical luminescent layer 9 is formed on the left in the image longitudinal surface of the light guide 1 and it is indicated that a further electrical luminescent layer 10 may be provided on the light exit surface 3, in which case it must be compellingly translucent designed.
    In contrast to FIG. 1, three individual LED elements 11 are arranged here as light sources at the light entry surface 2 of the light guide element 1, the light of which passes through the light guide element 1 and exits at the light exit surface 3 for illumination purposes. Depending on the geometry and construction of the light-guiding element 1, part of the light fed in on the light-entry surface 2 can also emerge on side surfaces.
    3 shows a more complex embodiment of a lighting device according to the invention in combination with a headlight module 12. This headlight module 12 can for example serve to produce a conventional low beam and has a light exit opening 13. This opening 13 is over most of its circumference of a light guide 14th surrounded, which is designed as a hollow cylinder with a plane, forward-facing light exit surface 15. The term "forward" is to be understood in the sense of light emission and does not necessarily mean "in the direction of travel of a vehicle". Opposite the light exit surface 15, the light guide 14 has a light entrance surface 16, in which light of a light guide 17 is fed. This light guide 17 corresponds in its geometry to the formation of the light guide element 14, that is, it also surrounds the light exit opening 13 of the headlamp module 12 and it may be formed in principle similar to that in Fig. 1 Asked light guide 4, but in contrast to this bent. The light feed can, what is not apparent in the drawing, at the two ends of the light guide 17, for. done by LED elements. Of the light guide 17, only a small portion in Fig. 3 can be seen, since this light guide is covered by a circumferential aperture 18 in the embodiment shown.
    In the embodiment shown, the inner and the outer surfaces of the hollow cylindrical light-guiding element 14 are provided with electrical luminescent layers 19. The headlight module 12 equipped with an illumination device according to the invention thus has at least three light functions, namely, for example, the aforementioned low-beam function originating from the headlight module as such and from a light source (not shown) arranged inside the module 12, which emanates forward through the light-guiding element 14 Light of the light guide 17 and thirdly, the originating from the electrical light-emitting layers 19 light. It is understood that in addition to the purely technical lighting functions thanks to the invention, special aesthetic effects can be achieved, the appropriate design specifications are justified. The light emitted through the light guide 17 also does not necessarily have to originate from a light guide, but individual light sources may also be provided in this case, or an electrical luminescent layer arranged on the light entry face 16 of the light guide element 14 ,
    In the drawings, the electrical connection means required for the power supply of the individual light sources are not shown, nor are their current and / or voltage sources, but in this regard, the relevant information for implementation are available to the person skilled in the art. It should also be mentioned that the electric luminescent layers e.g. OLED layers by no means must be formed over the entire surface, but in certain cases can also be designed as strips or other structures. The use of electrical luminescent layers in the illumination device according to the invention also offers the particular advantage that there is virtually no restriction with regard to the geometry of the light-guiding element. The surfaces to which the luminescent layers are adapted are de facto freely definable and, of course, do not have to be flat, which is apparent, for example, from the exemplary embodiment of FIG. 3. 8/14 -11-
    LlSTE OF THE REFERENCE SIGNS
    Light guide element, cuboid light entry surface light exit surface light guide end face LED element impurity arrangement light exit surface electr. Luminous layer Luminous layer, further LED elements Headlamp module Luminous outlet Luminous element Luminous exit surface Light entrance surface Light guide Iris
    Luminescent layers, electrical 9/14
    权利要求:
    Claims (12)
    [1]
    1. A lighting device for motor vehicles with a light-conducting element (1, 14), wel ches a light entrance surface (2,16) and a light exit surface (3,15), characterized in that at least partially on at least one surface of the light guide (1.14) an e-lectric luminescent layer (9,10, 19) is provided.
    [2]
    2. Lighting device according to claim 1, characterized in that the luminescent layer (9, 10, 19) is designed as an OLED layer.
    [3]
    3. Lighting device according to claim 1, characterized in that the luminescent layer (9, 10; 19) is designed as an electroluminescent layer.
    [4]
    4. Lighting device according to one of claims 1 to 3, characterized in that a rod-shaped light guide (4; 17) is provided which has at least one feed point (5) for light at least one light source (6), the light guide along at least a part of it Length of an impurity assembly (7) and one of these opposite light exit surface (8) and the light entrance surface (2; 16) of the light guiding element (1; 14) photometrically connected to the light exit surface (8) of the rod-shaped light guide.
    [5]
    5. Lighting device according to one of claims 1 to 4, characterized in that the light guide element (14) is designed as a hollow cylinder, wherein the two end faces of the cylinder wall, the light entrance and the light exit surface (16, 15) form.
    [6]
    6. Lighting device according to claim 5, characterized in that the Zylin derwand at least partially surrounds the light exit opening (13) of a headlight module (12). 10/14 -9- P13103
    [7]
    7. Lighting device according to one of claims 1 to 6, characterized in that the rod-shaped light guide (4; 17) in its geometry of the light entry surface (2; 16) of the light guide element (1; 14) is adjusted.
    [8]
    8. Lighting device according to one of claims 1 to 3 and 5 and 6, characterized in that the light entry surface (2) of the light guide element (1) individual light sources (11) are assigned, which feed light directly into the light guide.
    [9]
    9. Lighting device according to one of claims 1 to 8, characterized in that the light-guiding element (1; 14) consists of a transparent material.
    [10]
    10. Lighting device according to one of claims 1 to 3, 5, 6 and 9, characterized in that on the light guide surface (2,16) of the light guide element (1; 14) an electrical luminescent layer is provided.
    [11]
    11. Lighting device according to one of claims 5 to 10, characterized in that an electrical luminescent layer (19) on outer surfaces of the hollow cylinder designed as a light-guiding element (14) is provided.
    [12]
    12. Lighting device according to one of claims 1 to 11, characterized in that the electrical luminescent layer (9, 10, 19) is translucent. 11/14
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    同族专利:
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    引用文献:
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    法律状态:
    2016-11-15| HC| Change of the firm name or firm address|Owner name: ZKW GROUP GMBH, AT Effective date: 20161014 |
    2019-01-15| MM01| Lapse because of not paying annual fees|Effective date: 20180508 |
    优先权:
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    EP14726505.2A| EP2994348B1|2013-05-08|2014-04-30|Lighting system for motor vehicles|
    CN201480026112.2A| CN105392671B|2013-05-08|2014-04-30|Lighting device for automobile|
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